Butler's clearly frustrated and angry. What's less clear is why. The Wolves offered him a max extension which, like Kyrie, he turned down because he can get more if he waits. But then Towns signed his super max deal for substantially more money. Did that upset Butler? Maybe, but that's not the team's fault. Butler was obviously frustrated at times with the team's play last season, especially on defense. Is he angry or disenchanted with certain teammates (like Wiggins)? With Thibs as a coach? Does he think he's being misused on the court? The Wolves are anything but creative on offense, and they basically let Butler do what he wants, especially in crunch time (to KAT's detriment, imo). He's upset with Scott Layden - why? Because he hasn't yet been traded? But it was reportedly Thibs who has sabotaged those efforts. And his initial list of teams he wanted to be traded to? Not exactly the top teams in the league. So is that just his desire to be a big fish in a bigger pond, winning be damned?
From my vantage point, he's acting like a prima donna, which certainly doesn't help his current team. But if I had to choose between the two, I'd do everything I could to keep Butler and continue to build around him and Towns, and either demote Thibs (bring in a real GM) or let him go. I think Thibs is more to blame for the overall condition/culture of the Wolves than Butler, and Butler's a far better player than Thibs is a coach/GM.
This timeline might help you with your question.
It's no secret Butler wants to be paid a max contract. While the 4/$110M was the highest extension that the Wolves could offer, it wasn't the highest contract the Wolves could offer. According to a couple of articles I read - the best being this one:
https://zonecoverage.com/2018/timberwolves/the-two-paths-of-jimmy-butlers-next-maximum-contract/ - if the Wolves had cleared cap space, they could have offered 4/$145M. Of course, as the article points, out, to do that, the Wolves would have had to make some fundamental roster moves. When the Wolves didn't do that, it was clear they weren't going to give him the max available now.
So Butler meets with Thibs on (or about) September 19 and Butler likely points out, "Well if you're not willing to clear space to give me max money now, there's no way the team is going to give me max money next year, right"? If the Wolves do give Butler max money, from 2019-20 to 2022-23, Butler, Towns, and Wiggins will be making (approximately) 85.3% / 87.6% / 89.8% / 91.9% of the projected salary cap.
So when Butler looks at the salary cap, the amount of $ Wiggins and Towns are making, the amount of luxury tax that Taylor would have to pay to have any kind of contending team at all, he (probably correctly) decides that MIN is not the place for him.
And now MIN is screwing him over because Thibs doesn't care if he plays out his contract but Glen Taylor doesn't want to lose him for nothing.
So finally, Butler comes into camp, kicks everyone's ass, and basically says, "Go ahead and see what happens when Wiggins and Towns are the two best players on your team."
The stuff with Towns and Wiggins makes great copy but I think when people dig into it, they are finding out that it's mostly about money. And the ancillary parts of money, like respect and what-not. Problem for Butler is that he doesn't have much leverage at this point. Methinks that what happened on Wednesday was an attempt to create leverage to make MIN do something.